package collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class SortPoint {
    public static void main(String[] args) {
        List<Point>list=new ArrayList<>();
        list.add(new Point(5,8));
        list.add(new Point(15,60));
        list.add(new Point(57,89));
        list.add(new Point(1,4));
        list.add(new Point(10,8));
        list.add(new Point(22,35));
        System.out.println("原始数据："+list);
        //jdk 1.8才有的
        list.sort(new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                return o1.getX()-o2.getX();//按x坐标升序
            }
        });

        //list.sort((o1,o2)->o1.getX()-o2.getX());

        System.out.println("按x坐标升序："+list);
        /*
        Collections.sort(list, new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                int len1=o1.getX()* o1.getX()+o1.getY()+o1.getY();
                int len2=o2.getX()* o2.getX()+o2.getY()+o2.getY();
                //return len1-len2;//升序
                return len2-len1;//降序
                //return o1.getX()-o2.getX();按x坐标升序
                //return o2.getX()-o1.getX();按y坐标降序

            }
        });
        System.out.println(list);

         */
    }
}
